for people ages 18 years and up (full criteria)
at San Diego, California and other locations
study started
estimated completion



The primary objectives of this study are to evaluate the safety and tolerability of vesatolimod (formerly GS-9620) at escalating, multiple doses of vesatolimod in HIV-1 infected virologically suppressed adults on antiretroviral therapy (ART) and to evaluate the virologic effect of vesatolimod as measured by changes in plasma HIV-1 RNA.

Official Title

A Phase 1b, Randomized, Blinded, Placebo-Controlled Dose-Escalation Study of the Safety and Biological Activity of GS-9620 in HIV-1 Infected, Virologically Suppressed Adults


HIV-1 Infection Vesatolimod ARV regimen


For people ages 18 years and up

Key Inclusion Criteria:

  • HIV-1 infection
  • Aged ≥ 18 years at Pre-baseline/Day -13
  • On antiretroviral (ARV) treatment for ≥ 12 consecutive months prior to Pre-Baseline/Day -13
  • The following agents are allowed as part of the current ARV regimen: NRTIs,raltegravir, dolutegravir, rilpivirine, and maraviroc
  • The following agents are NOT allowed as part of the current ARV regimen: HIV protease inhibitors (including low dose ritonavir), cobicistat-containing regimens, elvitegravir, efavirenz, etravirine, and nevirapine
  • A change in ARV regimen ≥ 45 days prior to baseline/Day 1 for reasons other than virologic failure (eg, tolerability, simplification, drug-drug interaction profile) is allowed
  • Plasma HIV-1 RNA < 50 copies/mL at screening
  • Documented plasma HIV-1 RNA levels < 50 copies/mL (according to the local assay being used) for ≥ 12 months preceding the screening visit (measured at least twice using a licensed assay with a lower limit of quantitation of at least 40 copies/mL)
  • Unconfirmed virologic elevations of ≥ 50 copies/mL (transient detectable viremia,or "blip") prior to screening are acceptable. (If the lower limit of detection of the local HIV-1 RNA assay is < 50 copies/mL, the plasma HIV-1 RNA level cannot exceed 50 copies/mL on two consecutive HIV-1 RNA tests)
  • If ART regimen is changed ≥ 60 days prior to Pre-Baseline/Day -13, plasma HIV-1 RNA <50 copies/mL at Pre-baseline/Day -13 visit is required
  • No documented history of resistance to any components of the current ARV regimen
  • Availability of a fully active alternative ARV regimen, in the opinion of the Investigator, in the event of discontinuation of the current ARV regimen with development of resistance.
  • Hgb ≥ 11.5 g/dL (males) or ≥ 11 g/dL (females)
  • White blood cells (WBC) ≥ 4,000 cells/μL
  • Platelets ≥ 150,000/mL
  • Absolute neutrophil count (ANC) ≥ 1500 cells/μL
  • CD4 count ≥ 400 cells/μL
  • Albumin ≥ 3.9 g/dL
  • Alanine aminotransferase (ALT) and aspartate aminotransferase (AST) ≤ 2 × upper limit of the normal range (ULN)
  • Estimated glomerular filtration rate ≥ 60 mL/min
  • No autoimmune disease

Key Exclusion Criteria:

  • Hepatitis B surface antigen (HBsAg) positive
  • Positive anti-HBs antibody and negative HBsAg results are acceptable
  • Hepatitis C antibody (HCVAb) positive
  • Positive anti-HCV antibody and negative HCV polymerase chain reaction (PCR)results are acceptable
  • Documented history of pre-ART CD4 nadir < 200 cells/µL
  • Unknown pre-ART CD4 nadir is acceptable
  • A new AIDS-defining condition diagnosed within 90 days prior to screening
  • Acute febrile illness within 35 days prior to pre-baseline/Day -13

Note: Other protocol defined Inclusion/Exclusion criteria may apply.


  • UCSD Antiviral Research Center (AVRC)
    San Diego California 92103 United States
  • Mills Clinical Research
    Los Angeles California 90069 United States


in progress, not accepting new patients
Start Date
Completion Date
Gilead Sciences
Phase 1
Study Type
Last Updated